A rocket experiment that may shed light on the highest clouds in the Earth’s atmosphere was conducted from NASA's Wallops Flight Facility in Virginia on September 19, 2009. The experiment was launched on a NASA Black Brant XII Sounding Rocket.

The rocket was launched at 23:46 UTC.The Charged Aerosol Release Experiment (CARE) was conducted by the Naval Research Laboratory and the Department of Defense Space Test Program using a NASA four-stage Black Brant XII suborbital sounding rocket. Using ground based instruments and the STP/NRL STPSat-1 spacecraft, scientists will study an artificial noctilucent cloud formed by the exhaust particles of the rocket’s fourth stage at about 173 miles altitude